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#ifndef HepMCCandidate_FlavorHistoryEvent_h
#define HepMCCandidate_FlavorHistoryEvent_h
/** \class reco::FlavorHistoryEvent
*
* Stores a vector of information about the flavor history of partons
* as well as a classification of the event.
*
* It will return the following:
* nb = number of genjets that are matched to b partons
* nc = number of genjets that are matched to c partons
*
* This can be used to classify the event, for instance, as W+bb (2 b partons),
* W+c (1 c parton), etc.
*
* \author: Salvatore Rappoccio (JHU)
*
*/
// -------------------------------------------------------------
// Identify the class of the event
//
// Reports nb, nc, nlight genjets that are matched
// to partons.
//
// -------------------------------------------------------------
#include "DataFormats/Common/interface/Ptr.h"
#include "DataFormats/Common/interface/OwnVector.h"
#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/Common/interface/View.h"
#include "DataFormats/HepMCCandidate/interface/FlavorHistory.h"
#include <fstream>
namespace reco {
namespace helpers {
// Helper class to decide which type of event this should be classified as.
//
// Decision is based on a priority weighting of:
// 1. flavor (5 > 4)
// 2. type:
// 2a. Flavor decay
// 2b. Matrix element
// 2c. Flavor excitation
// 2d. Gluon splitting
// 3. delta R (if applicable)
//
struct FlavorHistoryEventHelper {
FlavorHistoryEventHelper(int iflavor, FlavorHistory::FLAVOR_T iflavorSource, double idR)
: flavor(iflavor), flavorSource(iflavorSource), dR(idR) {}
~FlavorHistoryEventHelper() {}
// Data members
int flavor; // pdg id
FlavorHistory::FLAVOR_T flavorSource; // flavor source
double dR; // if there is a sister, dR
// Comparison operators
bool operator<(FlavorHistoryEventHelper const& right) const {
if (flavor > right.flavor)
return false;
if (flavorSource > right.flavorSource)
return false;
if (dR > right.dR)
return false;
return true;
}
bool operator==(FlavorHistoryEventHelper const& right) const {
return flavor == right.flavor && flavorSource == right.flavorSource && dR == right.dR;
}
friend std::ostream& operator<<(std::ostream& out, FlavorHistoryEventHelper helper) {
char buff[1000];
sprintf(buff, "Flavor = %2d, type = %2d, dR = %6f", helper.flavor, helper.flavorSource, helper.dR);
out << buff << std::endl;
return out;
}
};
} // namespace helpers
class FlavorHistoryEvent {
public:
// convenient typedefs
typedef FlavorHistory value_type;
typedef std::vector<value_type> collection_type;
typedef collection_type::size_type size_type;
typedef collection_type::iterator iterator;
typedef collection_type::const_iterator const_iterator;
typedef collection_type::reverse_iterator reverse_iterator;
typedef collection_type::const_reverse_iterator const_reverse_iterator;
typedef collection_type::pointer pointer;
typedef collection_type::const_pointer const_pointer;
typedef collection_type::reference reference;
typedef collection_type::const_reference const_reference;
typedef FlavorHistory::FLAVOR_T flavor_type;
FlavorHistoryEvent() { clear(); }
~FlavorHistoryEvent() {}
// Set up the heavy flavor content
void cache();
bool isCached() const { return cached_; }
// Accessors to heavy flavor content
unsigned int nb() const {
if (isCached())
return nb_;
else
return 0;
}
unsigned int nc() const {
if (isCached())
return nc_;
else
return 0;
}
// Accessor to maximum delta R between highest flavor constituents
double deltaR() const {
if (isCached())
return dR_;
else
return -1.0;
}
unsigned int highestFlavor() const {
if (isCached())
return highestFlavor_;
else
return 0;
}
flavor_type flavorSource() const {
if (isCached())
return flavorSource_;
else
return FlavorHistory::FLAVOR_NULL;
}
// vector interface.. when mutable, make sure cache is set to false.
// only allow const access via begin, end, rbegin, rend
size_type size() const { return histories_.size(); }
const_iterator begin() const { return histories_.begin(); }
const_iterator end() const { return histories_.end(); }
const_reverse_iterator rbegin() const { return histories_.rbegin(); }
const_reverse_iterator rend() const { return histories_.rend(); }
// here is the proper mutable interface... this is done so that the cache is
// set by us, not the user
void push_back(const value_type& v) {
cached_ = false;
histories_.push_back(v);
}
void resize(size_t n) {
cached_ = false;
histories_.resize(n);
}
void clear() {
cached_ = false;
histories_.clear();
nb_ = nc_ = 0;
dR_ = 0.0;
highestFlavor_ = 0;
flavorSource_ = FlavorHistory::FLAVOR_NULL;
}
protected:
collection_type histories_; // FlavorHistory vector
bool cached_; // cached flag
unsigned int nb_; // number of b quark partons with a matched jet
unsigned int nc_; // number of c quark partons with a matched jet
double dR_; // maximum delta R between highest flavor constituents
unsigned int highestFlavor_; // highest flavor, corresponds to dR
flavor_type flavorSource_; // flavor source
};
} // namespace reco
#endif
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